论文信息 - Evaluation of IGCTs & IGBTs Choppers for DC Electrical Arc Furnaces

Evaluation of IGCTs & IGBTs Choppers for DC Electrical Arc Furnaces

Abstract Indirect conversion structures for DC electrical arc furnaces (EAF) can avoid the use of input filters and Static VAR Compensators (SVC) to reduce problems such as flicker, bad power factor and low rank harmonics. In this article, the authors present laboratory test results over 1.85 MW elementary units of a new supply for DC EAF. The power converter prototypes are built with two different semiconductor technologies, IGCTs and IGBTs. Experimental results have been used to identify the forward and switching characteristics of each semiconductor in real working conditions. Finally, the evaluation of the thermal cycling conditions for each semiconductor technology in the proposed supply for DC EAF is presented.

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